Flat-flame roof burner with low level of polluting emissions

SUBSTANCE: flat-flame roof burner (10) intended for installation in roof (21) that restricts combustion chamber (20) of steel heating furnace, includes the main metal hollow cylindrical housing (12), single fuel gas supply channel (13) which is concentric relative to the main housing (12), internal central nozzle (14) for injection of fuel gas and single air channel (30) connected to the main housing (12). Burner includes at least two external nozzles (17) located outside the main housing (12) for injection of fuel to combustion chamber (20), the first distributing device 15) made in the form of distributing valve for flow control of central fuel gas flow, gas distributing system (16) consisting of row of tubes (16') and meant for feed of at least two above external nozzles (17), the second distributing device (18) defined as the second distributing valve and meant for flow control of gas flow at least in two above external nozzles (17). By means of the above distributing valves (15, 18) the gas distribution percentage can be regulated between central internal nozzle (14) and at least two above external nozzles (17) so that possibility of continuous transition from flame working mode in which fuel is supplied only through central gas nozzle (14) to flameless mode in which fuel is discharged only through external gas nozzles (17) is provided.

This invention relates to ploskorelefnoj roof burner with low emissions.

In particular, the aim of the invention is flameless gas burner with low emissions of oxides of nitrogen.

The burner of the aforementioned type characterized in that it is installed on the arch furnaces for heat treatment, in particular in areas where high uniformity of the temperature field created by radiant heat transfer.

These burners are also known as "prokopenya burners" or "flameless roof burners and installed in a specially designated place on the roof of the furnace. To improve the efficiency of the combustion chambers operating at high temperatures, and to reduce fuel consumption, temperature, pre-heating the fuel to maintain combustion usually increase to the maximum extent possible that, as a consequence, leads to high emissions of nitrogen oxides, which are known to be associated with the maximum flame temperature.

In this regard, European patent No. 0041645 is part of a well-known technology relating solely ploskorelefnoj burner, which, however, is not characterised by low emissions of oxides of nitrogen.

Rules for control of air pollution, which the machining is rgles changes in the last few years,
provide for the permanent reduction of emission limits for emissions of nitrogen oxides, NOx.

It is therefore necessary to reduce the formation of oxides of nitrogen, improving the combustion process roof burners to meet the demands of the market, which given the existing level of 100 ppm can be reduced even up to 20-30 ppm, and in the presence of air, preheated to 500°C.

Poor combustion and flameless combustion methods are commonly used to reduce the formation of nitrogen oxides in the side and front burners (which can be installed on the walls of the combustion chamber and which have an axial development of the jet of reagent).

Because of this, the applicant has felt the need to use these methods in flameless burners, the application of which was still limited by the impossibility of maintaining the torch flat and return to spherical, and not to longitudinal torch.

Therefore, the main purpose of this invention consists in the design ploskorelefnoj burners with low emission of nitrogen oxides in accordance with the principles of flameless combustion, based on the method of separation of gases.

Another purpose of this invention is to provide in a furnace temperature regime with a stable work under conditions of higher temperature samov is Spumante fuel
which for natural gas is about 850°C. in fact, it is known that, in order to be able to control flameless combustion in safe mode, you must constantly and consistently maintain a working temperature above the specified temperature limit.

Another purpose of this invention is to improve the uniformity of the temperature field in the combustion chamber in a perpendicular direction to the code through the use of flameless combustion, which distributes the reaction of combustion of the entire volume of the chamber.

Another objective of this invention is to provide a flameless gas torch, capable of maintaining a low level of harmful emissions in a wide range of operating conditions and which is also suitable for simple changes of temperature profile in the combustion chamber.

Taking into account the above objectives, in accordance with this invention was developed pascopella roof burner with low emissions with the characteristics disclosed in the attached claims.

The constructive and functional characteristics of the present invention and its advantages with respect to the prototype will become more apparent from the following description, with reference to the accompanying drawings, which illustrate prokopchennuju roof burner with low ur the init emissions
provided according to the innovative principles of this invention.

In the drawings:

1 and 2 depict a partially elevated views in a perspective view with a section of a burner made in accordance with the invention and installed in the roof of the furnace;

3 and 4 depict a view of a perspective view of two parts of a burner made in accordance with the invention;

figure 5 depicts a schematic view of an installed burner.

With reference to the accompanying drawings, flameless gas torch with a low level of harmful emissions, which is the object of the invention, indicated generally by the number 10 position, and in the illustrated example, according to this invention, it is installed in the arch 21, which limits the camera 20 burning steel heat treatment furnace.

The burner 10 includes:

the main metallic hollow cylindrical body 12,

- single channel 13 for supplying the fuel gas, concentric with the main body 12,

- internal Central nozzle 14 for injecting fuel gas

the first distribution device 15, is presented as a non-limiting example in the form of valves and designed to regulate the flow of the Central stream of fuel gas,

- distribution system 16 consisting of a number of pipes 16',

at least two nozzle 17 SN is ROI the main body 12 for injecting fuel into the chamber 20 of the combustion,
powered by a pipe 16',

the second distribution device 18, designated as a non-limiting example of how the second control valve is designed to regulate the flow rate of gas in the above-mentioned at least two outer nozzles 17,

connection 19 is designed to connect pieces of pipe 16'to facilitate the dismantling of valves 18.

The burner is installed in a ceramic block 22 made of refractory material forming the arch 21, in which the neck 23 of the furnace.

This neck 23 of the furnace has a cylindrical rear portion 24 and the connecting recessed front region 25, preferably bounded by a wall 26 having a circular profile or ellipsoidal sector with a Central angle of 90°.

Single air channel 30, preferably heated, attached to the main metal housing 12.

The burner 10 also includes an air diffuser 31, preferably made of metal material, having a mounting plate 32, the tubular housing 33 and the number of blades 34 in number from four to twenty-six, preferably sixteen, installed with the possibility of turning to the right or to the left with an angle of tilt from 0 to 35°.

In the gas nozzle 14 has turbulator 35 gas made in the form of a spiral from ukreplennyj blades,
preferably metal 36 in number from three to ten, preferably six, twisted to the right or to the left with an angle of 0 to 60°, and the exhaust port 37 leading into the combustion chamber 20 of the gas nozzle 14, from which the fuel emerges with a speed of from 10 to 50 m/s

The metal housing 12 is connected to a refractory block 21 by means of a flange 40 and bolts 41 and plate 42 and the pins 18, or other suitable method.

The burner 10 in accordance with the invention, is arranged to work as an automatic regulator in flare mode (that is, it can bring the oven temperature up to the correct values), and in flameless mode with low emissions of nitric oxide.

This burner 10 also includes a housing 45 for the device ignition of the burner 10, and the housing 46 for automatic flame control.

These housings 45 and 46 communicate with the cavities arranged in a ceramic block 21 and marked, respectively, 47 and 48.

Housing, respectively, 45 and 46 provide mechanical support structure for the correct location of the ignition device and the machine control of the flame of the burner 10.

When you want to use the burner in "pilot" mode, i.e. when the temperature of the chamber 20 of the combustion furnace has reached the temperature of ignition of the fuel, mount the AC runs on gas,
emerging from the Central nozzle 14.

When the camera 20 of the combustion furnace has reached a temperature of self-ignition of the fuel gas in the air (i.e. for natural gas is about 850°C), you can proceed to the flameless mode: through manipulation of control valves 15 and/or 18 of the fuel gas is injected through these at least two outer gas nozzle 17 with a speed of from 20 to 200 m/S.

The pre-heated air coming from the pipe 30 passes through the housing 12 to the air diffuser 31, where it reaches a speed of from 50 to 150 m/s, depending on the supply pressure and preheating temperature of the air.

According to this invention, in fact, once installed thermal capacity, supplied by the burner 10, it is possible a continuous transition from one mode to another by changing the percentage distribution of the liquid fuel between the Central inner nozzle 14 and the specified at least two outer nozzles 17 a simple influence on the system of distribution areas, the valves 15 and 18, without any modification to the feed support combustion environment.

When the burner operates, supports combustion air, preferably preheated, is introduced into the chamber 20 of the combustion air through the diffuser 31.

The following describes the operation of the two modes - flame and flameless.

In the flaming mode is e,
compatible with any temperature of the combustion chamber, the fuel is directed only through the Central gas nozzle 14 through the opening of the distribution valve 15 and/or 18.

At the mouth of the furnace 23 between air and fuel to create an excellent area mixing to form a limited and stable flame front.

In flameless mode, compatible with temperatures in the combustion chamber above the temperature of ignition of the fuel, the fuel will take only through the outer gas nozzle 17 through the opening of the distribution valve 15 and/or 18.

Gas jet penetrates into the layer of air adjacent to the curved surface of the neck of the Converter 23, and cause the combustion reaction in the field with a homogeneous atmosphere in which there is an optimum mixing between fuel, preheated air and fuel gas; combustion reaction occurs in the weak form no formation of the flame front.

In the areas of mixing gas with support combustion of the substance and products of combustion, already upstream of the reaction, there is reduced oxygen levels below the atmospheric level. Limiting oxygen concentration allows the reaction to develop in greater volume. This causes a reaction between the more depleted reagents, which, vsledstvii is this,
develops slower. This limits the formation of temperature peaks, which leads to the formation of nitrogen oxides (thermal NOx).

In flameless mode, the gas may be filed:

- parallel to the axis of the burner or

- it can be entered so that the flow of fuel gas moving tangentially at an angle from 0°to 15°) and radial (angle from 0°to 15°) relative to the axis of the burner so that they move away from the axis of the burner; or

- it can be entered so that the flow of fuel gas moving tangentially at an angle from 0°to 15°) and radial (angle from 0°to 15°) relative to the axis of the burner so that they are directed to the axis of the burner.

Changing the amount of gas distributed by the valves 15 and 18, between the Central nozzle 14 and at least two outer nozzles 17 allows a continuous transition from flaming mode to flameless mode.

You can also run the housing 45 of the ignition device coaxially to the axis of the burner or with a slope from 0° to 30° relative to the axis of the burner.

Similarly, the housing 46 of the flame supervision devices may be coaxial with the axis of the burner or angled from 0° to 30° relative to the axis of the burner.

There are preferably two outer nozzle 17, placed symmetrically with respect to the axis of the burner, as shown in the drawings, but may be also the four nozzles.
According to a preferred variant implementation, the nozzles are arranged vertically.

Instead of installing the distributor valve 15 may be calibrated washer installed between flanges.

Also, if possible, it is useful to provide refractory insulation inside the metal housing 12.

If there are no special requirements for Assembly/dismantling, mounting sleeve 19 may be absent. Also defines the following geometric characteristics of the burner according to the invention, installed in the furnace roof:

R is the distance to the output surface of any of the above at least two outer nozzles 17 from the arch of the combustion chamber; this distance is positive, if considered external nozzle 17 penetrates into the combustion chamber; this distance is negative if considered external nozzle 17 remains in the refractory block 10;

h - distance to surface bounded by a circumference of the air diffuser 31 and the inner side of the combustion chamber from the roof 21 of the combustion chamber;

I is the distance from the center of the surface of any of the above at least two outer nozzles 17 from the axis of the burner;

dl is the diameter of the tank openings refractory block 22 for metal air diffuser 31 corresponding to the surface bounded by a circumference of the air diffuser 31 is nutrena side of the combustion chamber 20;

H - the thickness of the refractory block 22;

D is the diameter of the maximum circle curved surface of the refractory block 22;

DB - outer diameter of the refractory block 22;

Based on the definitions listed above, this invention has the following relationship between the parameters (sign<=means "less than or equal to"):

-0,1<=(R/N)<=0,1, preferably (R/N)=-0,06;

0<=(h/H)<=0,75, preferably (h/H)=0,5;

0,1<=dl/D<=0,4, preferably 0,17<=dl/D<=0,22;

0<=(DB-D)<=0.5, and preferably (DB-D)=0,1.

Proceeding from the above description with reference to the drawings, it is obvious that the gas burner according to the invention is very useful and has advantages. Thus, the target specified in the introductory part of the description, have been achieved.

Form of a gas burner according to the invention, as well as the materials may differ from those that were considered in an illustrative and non-limiting purposes in the drawings.

The protected scope of the invention is limited, therefore, the attached claims.

1. Pascopella roof burner (10), intended for installation in the arch (21), which limits the camera (20) burning steel heat-treating furnace, and includes a core metal hollow cylindrical body (12), single channel (13) for supplying the fuel gas, concentric with the main is orpus (12),
the Central inner nozzle (14) for injecting a fuel gas and a single air channel (30)attached to the main body (12), characterized in that it containsat least two outer nozzles (17)located outside of the main body (12)for injecting fuel into the combustion chamber (20),the first distribution device (15)made in the form of valves for controlling the flow of the Central stream of fuel gas,distribution system (16), consisting of a number of pipes (16') and designed to supply these at least two outer nozzles (17),the second distribution device (18), designated as the second control valve is designed to regulate the flow of gas in said at least two outer nozzles (17),moreover, using the specified distribution valves (15, 18) can be adjusted percent distribution of gas between the Central inner nozzle (14) and the specified at least two outer nozzles (17) with the possibility of a continuous transition from flaming operating mode in which fuel is routed only through the Central gas nozzle (14), to the flameless mode in which the fuel is given only through the outer gas nozzle (17).

2. Pascopella roof mount is ka (10) according to claim 1,
characterized in that the said outer nozzles (17) are disposed symmetrically with respect to the axis of the burner (10).

3. Pascopella roof burner (10) according to claim 1, wherein there are four said external nozzle (17).

4. Pascopella roof burner (10) according to claim 1, characterized in that the said outer nozzles (17) are arranged vertically.

5. Pascopella roof burner (10) according to claim 1, characterized in that the said outer nozzles (17) are located to enable the injection of gas parallel to the axis of the burner (10).

6. Pascopella roof burner (10) according to claim 1, characterized in that the said outer nozzles (17) are located so that when the injection of the flow of fuel gas moving tangentially at an angle from 0°to 15°) and radial (angle from 0°to 15°) relative to the axis of the burner so as to deviate from the axis of the burner.

7. Pascopella roof burner (10) according to claim 1, characterized in that the said outer nozzles (17) are located so that when the injection of the flow of fuel gas moving tangentially at an angle from 0°to 15°) and radial (angle from 0°to 15°) relative to the axis of the burner so as to be directed to the axis of the burner.

8. Pascopella roof burner (10) according to claim 1, characterized in that it is installed in a ceramic block (22)made of refractory material forming the NWO is (21),
where is the mouth of the furnace (23), and specified the mouth of the furnace (23) contains essentially cylindrical rear portion (24) and the associated recessed front region (25), preferably bounded by a wall (26)having a profile circular or ellipsoidal sector with a Central angle of 90°.

9. Pascopella roof burner (10) according to claim 1, characterized in that it also contains an air diffuser (31), preferably made of metal material, having a mounting plate (32), a tubular casing (33) and the number of blades (34) in the amount of from four to twenty-six, preferably sixteen, installed with the possibility of turning to the right or to the left with an angle of tilt from 0 to 35°.

10. Pascopella roof burner (10) according to claim 1, characterized in that the Central gas nozzle (14) has turbulator (35) gas, is made in the form of a spiral of fixed blades, preferably metal (36), in the amount of from three to ten, preferably six, are installed with the possibility of turning to the right or to the left with an angle of 0 to 60°, and the outlet opening (37), leading into the chamber (20) combustion of a specified gas Central nozzle (14).

11. Pascopella roof burner (10) according to claim 1, characterized in that it also includes a housing (45) for ignition of the burner (10)and the housing (46) is La machine flame control,
moreover, these housing (45, 46) made the communicating placed in a ceramic block (21) the corresponding housings (47, 48), as well as provide mechanical support structure for the right location, respectively, of the ignition device and the machine control of the flame of the burner (10).

12. Pascopella roof burner (10) according to claim 11, characterized in that the housing (45) of the ignition device is located coaxially to the axis of the burner or with converging inclination from 0 to 30° relative to the axis of the burner, and the housing (46) flame supervision devices is coaxial to the axis of the burner or with converging inclination from 0 to 30° relative to the axis of the burner.

13. Pascopella roof burner (10) according to claim 1, characterized in that it has the following options:(p) the distance from the output surface of any of the above at least two outer nozzles (17) from the arch of the combustion chamber, and the specified distance is positive, if considered an external nozzle (17) penetrates into the combustion chamber, and this distance is negative if considered an external nozzle (17) is still in a refractory block (10);(h) distance to surface bounded by a circumference of the air diffuser (31) of the inner side of the combustion chamber from the roof (21) of the combustion chamber;(I) distance to the center of the output surface of any of the above for less is th least two outer nozzles (17) from the axis of the burner;
(dl) the diameter of the tank openings refractory block (22) for metal air diffuser (31)corresponding to the surface bounded by a circumference of the air diffuser (31) of the inner side of the chamber (20) combustion;(H) the thickness of the refractory block (22);(D) the maximum diameter of the circumference of the curved surface of the refractory block (22);(DB) outer diameter refractory block (22);when this is established the following relation between the parameters:-0,1<=(R/N)<=0,1, preferably (R/N)=-0,06 (where the sign <= means "less than or equal to").

SUBSTANCE: burner for gas burning comprises cylindrical vessel, stabiliser, gas swirler, besides cylindrical vessel is equipped with controlled gate for air supply, and at other side of vessel there is a stabiliser installed along axis with pipe of gas supply, and secondary air swirler blades are rigidly fixed on external cylindrical surface of stabiliser, in inner cavity there is injector installed coaxially and rigidly fixed near end of air and gas supply, and on its outer surface there are blades of gas swirler fixed, and on inner side there is a plate swirler of primary air fixed with two twist flows, besides blades of gas swirlers and secondary air swirlers and plate swirler of primary air have the same twisting direction, and gas swirlers and secondary air swirlers also have equal number of rigidly fixed and axially arranged blades.

EFFECT: improved quality of fuel burning by improved arrangement for mixing of fuel gas, primary and secondary air jets.

SUBSTANCE: burner consists of air supplying case with vortex, of central gas pipe, and of cup with air holes; inside cup there is installed gas distributing grate made in form of two hollow truncated cones; burner also contains tangential branch rigidly fixed in case base. Section areas of spaces between the cup and bigger bases of hollow truncated cones of the grate and section areas of spaces between the cup and smaller bases of the hollow truncated cones of the grate are equal.

EFFECT: design of burner facilitating combustion of low-calories gaseous fuel in boilers, chambers and furnaces; also combustion is characterised by considerable volume consumption, by generation of short flare of length not over 3-5 of diametre of outlet opening of burner and by elimination of gas flue thermal damage.

SUBSTANCE: burner device incorporates a central fuel jet and coaxial circular rings forming air feeding channels provided differently directed blade swirlers and tapered deflectors arranged at the output of every channel to deflect air flows from the center to periphery. Here, the swirler adjacent blade inclination angles are set be different with the 0.5 to 0.8 ratio.

EFFECT: higher uniformity of heating the furnace space by intensifying air turbulence in crossing its swirled flows.

SUBSTANCE: flow swirler can be used for processes of mixing and re-mixing of media, for handling heat exchange process between media and for transportation of different media with lower hydraulic resistance, particularly, different kinds of liquids, gases, different-phase media mixtures and pseudo-liquated powder-shaped media. Double-bladed fluid medium flow swirler has flat blades mounted in tube at angle to flow of liquid medium. Swirler has two similar swirlers mounted in tube with round cross-section. Any blade has profile in form of half-ellipse cut along its longer axis to two blades and achieved due to sloped section of tube, which section is made at angle to axis of tube being equal to angle of slope of blade's edge, formed by longer axis of ellipse, to axis of tube at mounting blades in tube. Angle of slope of blades' edge, formed by longer axis of ellipse, is inversely symmetrical to axis of tube and it equals to 5-85°.

FIELD: the invention refers to the field of incineration of fuel particularly to the construction of a fuel-feeding arrangement.

SUBSTANCE: there are two proposed variants of fulfillment of diffusion injector type burners consisting of a body from one side rigidly connected with a nozzle fulfilled in the shape of a diffuser and from the other side- also rigidly- with a control mechanism having a branch pipe for feeding gas. Inside the body there is built-in from the side of the nozzle a throttle fulfilled in the shape of a truncated cone, with its large foundation directed into the side of gas movement, moreover the correlation of the diameter of the nozzle to the large diameter of the throttle does not prevail 1,4. On the throttle there are blades rigidly fixed in such a way that the projections of the lateral walls of the blades overlap free section of the burner. At that the throttle is connected with the control mechanism with the aid of a rod connected with the control mechanism movably. According to the first variant the rod is fulfilled hollow and the throttle is fulfilled with a hollow axis channel, at that the throttle and the rod are connected between themselves hermetically and a regulated shutter is installed in the rod from the side of the control mechanism. According to the second variant the rod is fulfilled hollow. The throttle is fulfilled with a hollow axis channel, at that the throttle and the rod are connected between themselves hermetically. In the channel formed with the cavity of the rod and the axis channel of the throttle there is the second burner for liquid fuel and (or) a tube each of which has one end on the edge of the throttle and with the other end the burner for liquid fuel is connected with an alternative kind of liquid fuel, and the tube is connected with liquid combustible wastes. Besides a regulated shutter fulfilled with possibility of overlapping the free section of the hollow rod and for possibility for passing through it of the second burner for liquid fuel and the tube is installed in the rod from the side of the control mechanism. The invention is directed on increase of intensification of incineration of fuel and besides on providing incineration of several kinds of fuel including utilization of liquid combustible gases.

EFFECT: allows reduce consumption of materials in the process due to replacement of part of the main fuel on more cheap residues of production.

SUBSTANCE: vortex burner comprises central pipe for supplying oxidizer and outer pipe for supplying fuel. The central oxidizer supply pipe and fuel supply pipe are axially aligned. The oxidizer supply pipe is provided with the deflecting housing that is coaxial to the pipe and is provided with the blades of static swirler and central coaxial cylindrical passage. The outlets of the deflecting housing, the pipe for oxidizer supply, and the pipe for fuel supply are U-shaped to turn around the burner. The surface of the deflecting housing traces the inner wall of the pipe for supplying oxidizer, and the blades of the swirler pass from the surface of the body having no aerodynamic form to the surface of the deflecting housing. The inner and outer blades of the swirler are mounted inside the swirler with an inclination of from 15 to 75 degrees, preferably 20-45 degrees. The outlet cone angle of the central pipe for supplying oxidizer and outer pipe for fuel supply ranges from 15 to 60 degrees, preferably from 15 to 40 degrees.

FIELD: the invention refers to burners in which rotational motion is given at least to one of the components.

SUBSTANCE: the burner is designed for installation into the front arrangements of the combustion chambers of stationary gas turbine engines working on gaseous fuel and provides reduction of detrimental rejections of NOX into the atmosphere. The whirl gas burner has a pipeline of feeding of gaseous fuel and coaxially located behind its output a cylindrical mixer of fuel and air with an air wane swirler at the input into the mixer. Inside the pipeline of feeding gaseous fuel there is an output section of the pipe of feeding water with a water swirler. Behind the cut of the pipe of feeding water there is a cylindrical mixer of gaseous fuel and water with a fuel wane swirler before its output.

EFFECT: allows to reduce detrimental rejections of NOX into the atmosphere.

FIELD: the invention refers to arrangements in which components of fuel are given rotational motion.

SUBSTANCE: the burner is designed for combustion chambers of stationary gas turbine engines and provides reduction in forming nitric oxide Nox and their rejections into the atmosphere. The whirl burner has a pipeline of feeding of gaseous fuel with a cylindrical mixer of fuel and air coaxially located on it behind its output with an air wane swirler on the input into the mixer and a diffuser at the output. The pipeline of feeding of gaseous fuel has in series connected a fuel collector, a swirler and an output section in the shape of a cylindrical bushing closed from one butt-end and connected from the side of the other butt-end trough the output bushing of the smaller diameter with the mixer of fuel and air, the cylindrical bushing is additionally connected through the water swirler and the water collector with the pipeline of feeding water. At that the fuel and water collectors are located on the cylindrical mixer of fuel and air in the area of the air wane swirler, the fuel and water swirlers are fulfilled in the shape of channels in the blades of the air swirler directed crosswise the longitudinal axle of the burner at a tangent to the inner diameter of the cylindrical bushing.

EFFECT: provides reduction in formation of nitric oxides Nox and their rejections in the atmosphere.

SUBSTANCE: burner comprises first piping passage provided with at least one end section having outlet port with rectilinear axis, second piping passage which is external and coaxial to the first passage and defines a ring-shaped free space together with the first passage, and means for supplying independent fluids to the first passage and in the space. The fluids are made of fuel and agent for maintaining combustion. The outlet port of the first passage comprises axially symmetrical surface. The burner is additionally provided with means for setting the fluid in flow. The surface is conical with an angle of 20°-80° and has curved cross-section.

SUBSTANCE: radiation burner consists of case with circular cover, of perforated radiating head made in shape of cavity formed with two radiating surfaces set in case, and of system of supply of fuel-air mixture. A side part of the burner case is made as two thin-wall coaxial cylinders, circular gap between which is sealed and vacuumised, while the circular cover is connected to the case via a thermo-insulating padding.

SUBSTANCE: radiation heating device of industrial furnace includes assembly (1) of the first burner, which includes the first burner (2) forming hot exit gas due to fuel combustion with combustion air, the first air supplying device (60) through which plenum air is supplied to the first burner (2), and the first tube (20) of radiation heating, which includes rear end section (20a) connected to the first burner (2), and front end section (20b) located at some distance from rear end section (20a) with possibility of passage of hot exit gas, which is formed with the first burner (2), from rear end section (20a) to front end section (20b) of the first tube (20) of radiation heating and transfer on this way of heat energy to tubular wall of the first tube (20) of radiation heating, assembly (1') of the second burner, which includes the second burner (2') forming hot exit gas owing to fuel combustion with combustion air, the second air supplying device (60') through which plenum air is supplied to the second burner (2'), and the second tube (20') of radiation heating, which includes rear end section (20a') connected to the second burner (2') and front end section (20b') located at some distance from rear end section (20a) with possibility of passage of hot exit gas, which is formed with the second burner (2'), from rear end section (20a') to front end section (20b') of the second tube (20') of radiation heating and transfer on this way of heat energy to tubular wall of the second tube (20') of radiation heating; the first connecting element (50) connecting rear end section (20a) of the first tube (20) of radiation heating to front end section (20b') of the second tube (20') of radiation heating so that at least some amount of exit gas, formed in the second tube (20') of radiation heating can be transferred to the first burner (2) and again combusted by using the first burner (2), the second connecting element (50') attaching rear end section (20a') of the second tube (20') of radiation heating to front end section (20b) of the first tube (20) of radiation heating so that at least some amount of exit gas formed in the first tube (20) of radiation heating can be transferred to the second burner (2') and again combusted by using the second burner (2'). Each connecting element is equipped with injection nozzle (76, 76') which injects exit gas from tube (20, 20') of radiation heating, which is connected to it. Injection nozzle (76, 76') is provided with possibility of movable adjustment providing the control of the amount of exit gas drawn from tube (20, 20') of radiation heating, which is connected to it.

SUBSTANCE: infrared gas burner consists of combustion chamber, of diffusion burner, of branches for supply of primary air, of jacket, of branch for supply of secondary air, of partition, and of orifices for supply of secondary air. Also, partition facilitates supply of fuel-air mixture into the main part of combustion chamber and is forwarded from cross section of a tangential supply of primary air into volume of the main part of the combustion chamber.

SUBSTANCE: start-up method of direct heating system includes fuel introduction zone, combustion zone and process zone which exchanges heat with the above combustion zone, at which there passed is hot fluid medium of oxidiser through the above combustion zone for the period of heating, which is enough to increase temperature of the above direct heating system to required temperature, steam passes through the above process zone during the second time period which is enough to control the temperature of the above direct heating system to the second required temperature, and fuel fluid medium containing fuel passes through the above fuel introduction zone after the above required temperature and the above second required temperature is reached.

EFFECT: invention allows bringing into the operation the direct heating device after some outage time or from cold start-up.

SUBSTANCE: invention used for heat generation, light, power during burning fuel in radiation recuperative burner. The radiation recuperative burner consists of a case, inside of each a burner tunnel located, a countercurrent recuperator, which has at least one combustion product tunnel and at least one oxidant tunnel, burner tunnels fuel injection unit, connected to external pipeline for fuel supply, burner tunnels oxidant injection unit, connected to external pipeline for oxidant supply and combustion product discharge unit, connected to external pipeline for combustion product withdrawal, a lighter, at that part of the burner case in which burner tunnel located, made of fireproof and refractory materials, oxidant recuperator's tunnels have a thermal contact surface with combustion products tunnels, by opposite side of which gas flow direction is reversal, the oxidant tunnel exit connected to the burner tunnel, the combustion products tunnel entrance connected to the burner tunnel, the fuel injection unit hermetically connected to the burner tunnel, the oxidant injection unit hermetically connected to the recuperator's oxidant tunnel entrance, the combustion products discharge unit hermetically connected to recuperator's combustion products tunnel exit. The burner tunnel inside the case is sealed and isolated from outside environment, in the recuperator additionally created one or few fuel tunnels, which have thermal contact surfaces with the recuperator's combustion products tunnels, by opposite side of which gas flow direction is reversal, at the recuperator located inside of the burner case, its tunnels walls, which adjusted to the burner tunnel, made of fireproof and refractory materials, the fuel injection unit hermetically connected to the burner tunnels via recuperator's fuel tunnels, and part of the case external surface neighboring to the burner tunnel presents the burner radiation surface.

EFFECT: invention allows to create device, which can perform fuel total combustion and heat exchange at temperatures higher than 2000°C.

SUBSTANCE: invention relates to chemistry and can be used in oxidative conversion processes. Synthetic gas is obtained from burning a mixture of hydrocarbon material with oxidising agent with excess coefficient of the oxidising agent less than 1 at temperature below 1400 K inside one or several chambers, completely or partially formed from material which is permeable by the mixture of hydrocarbon material and oxidising agent. The mixture of hydrocarbon material and oxidising agent is fed through the permeable bottom of the chamber(s), or through permeable walls of the chamber(s), or through permeable walls and bottom of the chamber(s), and combustion products are let out through the upper section of the chamber(s).

EFFECT: invention simplifies technology and provides for high efficiency of the process.

SUBSTANCE: invention concerns thermal power industry, particularly methods and devices of gas fuel combustion in infrared burners. Method of gas fuel combustion in infrared irradiation burner involves preparation of homogenous gas fuel and air mix in ejector, mix heating in distribution chamber and in perforated ceramic nozzle channels to ignition temperature, burning on nozzle surface and in the space between nozzle and metal mesh, generation of stripped gas and air mix with air excess factor α=1.3-1.5. Gas and air mix is tripped either by air supply to the burner ejector by fan, or by increasing rated gas pressure before burner in 6-7 times.

SUBSTANCE: invention relates to heat-and-power engineering, particularly, to radiative burner and can be used for domestic and industrial needs in different heat-and-power installations, in combustion chamber of gas-turbine installation, heaters, dryers, stoves. Radiative burner contains case, injector in the form of gas nipple with mixing tube and radiating jet in three-dimensional configuration. Jet is implemented from elements in the form of multitude of cylinders or right-angle prismes, located inside the burner case and implemented from thermal-resistant thin-walled permeable material, herewith clearance X between radiating surfaces of elements is X=H/a, where H -height of elements; a=2 - 20.

EFFECT: invention increases operational characteristics of burner: leads to abrupt increasing of burner specific power, provides making of burner facility as light and compact, and increase its field of application.

SUBSTANCE: invention relates to heating devices with temperature radiators being heated by fuel and air mixture burning in flameless mode for heating mainly road covering during maintenance operations. The flameless infra-red heater of road covering includes enclosed radiating perforated panel with through channels. The panel is mounted in the housing and made of refractory ceramics. From the outside, the panel is protected with refractory mesh. The heater also includes injector linked with gas balloon and air intake. Besides, together with the inner cavity, the radiating refractory panel forms a working chamber. There is a distributor of gas and air mixture. The radiating panel is installed in the lower part of the housing and directed to the road covering when it is in working position. The injector with air intake is represented with common injection and mixing unit being installed outside the housing and shifted with regard to its centre and connected with pipeline body. The pipeline is introduced into the housing in the centre of the upper surface and ends up with nozzle projected into the working chamber. The air and gas distributor is made in the form two metal plates of different length. The plates are fixed to the inner surface of the housing from the opposite sides with regard to the free edges of the plates being one above the other and overlapping the next one along the whole length. The plates overlap the working chamber by the cross section area. Besides, the short metal plate is installed close to the radiating perforated panel. The long metal plate is tilted to the side of radiating perforated panel. There are gaps between the long metal plate and nozzle from the one panel side and short metal plate from the other panel side. There is a hollow along the long metal plate axis. The hollow is in the form of spherical surface segment. Its radius is equal to the nozzle radius coupled with the segment of spherical surface. The nozzle is directed to the free edge of the long metal plate by its larger diameter. The air intake is represented with two coaxial hollow cylinders of different length. The short cylinder of smaller diameter is provided with an open-ended perforation. There are open-ended slots on the long cylinder along its moving line and to the length of the short cylinder perforation. Both cylinders are interconnected by flanges with the injector being installed on its axis. The tapered part of the injector with the channel opening on the cone point for gas discharge are available inside the short cylinder of the smaller diameter. The cylinder part is linked with the pipeline supplying gas from the reservoir. Besides, the cylinder with larger diameter is linked with the air-gas mixture supply pipeline on the free end. The short plate overlaps radiating perforated panel by no more than 0.2 of its area.

EFFECT: increase of heater operation effectiveness under any weather conditions.

SUBSTANCE: invention relates to heating devices intended for natural gas burning. It can be used in industry and other branches. Gas burner consists of a housing with the attached gas supply unit and gas-air mixture preparation unit represented with diffuser, ceramic tiles, reflector, igniting control unit in the form of automatic ignition controller, pressure gas controller, ignition electrode, flame detector, partition with holes in the form of throttling wall being installed in the housing and separating the burner into two unequal parts. The holes are displaced irregularly at total square area being 5-8 times less than total square area of holes in ceramic tiles. The gas supply unit, diffuser and automatic ignition controller are placed in the sealed enclosure ensured with the forced air supply. The holes may be made in diffuser and provided with regulating gate. The compressed air supply fitting is placed into enclosure so that automatic ignition controller can be blown round to a maximum extent. The invention ensures the possibility of heating large industrial rooms and using burner in industrial processes when super high temperature is generated.

EFFECT: possibility of heating large industrial rooms and using burner in industrial processes when super high temperature is generated.

SUBSTANCE: proposed gas infra-red radiator includes radiation tube with burner fitted at its one end; this burner is provided with gas and air supply passages; secured at other end is fan; radiator is also provided with cavity bounding the area inside which radiation tube is located; it consists of reflector and shield connected with it by means of bottom; one end of said cavity may take air from surrounding medium; cavity is connected with passage feeding air to burner. Bottom of cavity has holes located smoothly over entire length.